Hello! I published a paper on WR time distribution performance that you might consider interesting. It's available at IEEExplorer: https://ieeexplore.ieee.org/document/8400550/
Abstract: This article investigates the ultimate limits of White Rabbit (WR), an high-accuracy time distribution system based on FPGA. The knowledge of such limits is essential for new emerging applications that are evaluating WR. In this article, we identify and study the key elements in the WR synchronization: the Digital Dual Mixer Time Difference phase detector and the Gigabit Ethernet transceiver. The benchmarks and experimental analysis of these key elements allow us to determine the WR Switch performance limits and evaluate their evolution with newer FPGAs. The identified performance limits are achievable by the present-day generation of WR Switch. The ultimate limits of short-term synchronization performance due to FPGA implementation have been derived through analysis and then demonstrated using the existing WR Switch enhanced with an additional daughter-board. This combination (WR Switch and daughter-board) achieves a tenfold improvement in terms of phase noise, jitter and shortterm stability with respect to the current WR performance. Both phase detectors and Gigabit transceivers have a similar phase noise contribution equal to a short-term stability of MDEV 4E-13 at τ=1 s (dominated by flicker PM noise). cheers Mattia _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.